fuel system

[golgo13b]

The list of parts i need is getting smaller, and the pile of parts next to the computer is getting bigger. I've come to the fuel segment. I have a DE that i'm going to turbo. as far as fuel goes i plan on purchasing:

JWT ECUz32 MAFNismo (550cc) injectorsand a warlboro 255lpm pump

Am I forgetting anything, or is there any cheaper pre-packaged system that might be cheaper than buying everything seperatly?

[emo_tactical9]

Those injectors are expensive(unless you're getting hooked up on some used ones), i'd look for something cheaper. Maybe some subaru injectors or some DW's.

[golgo13b]

What about fuel pressure? About what can i run with a mostly stock system? I'll be changing the pump and injectors and adding a fuel pressure regulator. Any suggestions on which regulator and what pressure to run are welcome.

[scheffler]

the FPR that AMS sells is what I have and i have had no problems and it looks pretty good to

something to add to your list is a biger fuel filter 300zx or something.

[golgo13b]

My bad, I got the 300zx fuel filter alreadyon the car so I forgot about it. I was wondering about the fuel pressure because using injector/horsepower calculators has led me to beleive it may need to be increased, but i dont know how much.

[eazye2000]

Rising Rate Fuel Pressure Regulator. 1:1 on Boost.

You want your Fuel Pressure to raise 1PSI per every 1PSI of boost so that the fuel pressure on your rail stays 'consistent'. If you have 1PSI of boost trying to work its way back into the injector, you effectively lose 1PSI of fuel pressure. Any of that make sense?I'm sure someone else can explain it better.

Oh yeah. And I have an Aeromotive FPR.
Modified by eazye2000 at 1:31 PM 12/29/2007

[Zippy69]

He won't need an FMU. If he runs a JWT ecu and 550cc injectors with a walbro, that will be all he needs. The FMU would force too much fuel through, making for a rich situation.The walbro will supply enough fuel and the JWT ecu will tell the injectors when to give it.Check out Deastchwerks injectors instead. They will run you about $300. I think they give a discount to nico members so make sure to tell them.

[eazye2000]

He won't need an FMU.

You're right. He doesn't need an FMU. He needs a Fuel Pressure Regulator. Or he can run the stock one, but it's not very accurate, and will fluctuate under boost.An FMU is needed when he wants to run stock injectors, and up the pressure. They rate those in an 8:1, 10:1, and 12:1 typically. For every 1psi of boost, he'll get an additional 8psi of fuel pressure, respectively. I'm sure you guys know how those work. Just reiterating in case anyone is confused.

Also, an FMU is typically used in conjunction with your FPR
Modified by eazye2000 at 7:19 PM 12/29/2007

[Zippy69]

You're right. He doesn't need an FMU. He needs a Fuel Pressure Regulator. Or he can run the stock one, but it's not very accurate, and will fluctuate under boost.An FMU is needed when he wants to run stock injectors, and up the pressure. They rate those in an 8:1, 10:1, and 12:1 typically. For every 1psi of boost, he'll get an additional 8psi of fuel pressure, respectively. I'm sure you guys know how those work. Just reiterating in case anyone is confused.

Also, an FMU is typically used in conjunction with your FPR

Isn't an FMU a rising rate fuel pressure regulator? It's not linear like a regular fpr. Doesn't rising rate mean that as boost (or demand) increases, that the "rate" is increased?I don't want to argue, I just want myself and everybody else to be clear.If I'm wrong, then I'm wrong. It's still all good.

[golgo13b]

With the aeromotive FPR, is anything else needed to bolt up to the factory fuel rail?

[eazye2000]

An FMU IS a rising rate fuel pressure regulator, in a way. That's why it's used in conjunction with your stock FPR. It also raises on a ratio with boost. The 1:1 FPR is totally different in the sense that it IS the Fuel Pressure Regulator, and it will control the fuel on a 1:1 ratio with boost.

I'm terrible at explaining things.

[Zippy69]

Thats ok E, I'm terrible at understanding them.